JP2008019332A - Highly durable paint and construction with its coating film formed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paint providing high durability performance, capable of reducing the oscillation impact from a movable body for reducing the destruction of a construction with its coating film formed, and a construction with the paint coating film formed. <P>SOLUTION: A paint containing 30.0 to 80.0 wt.% of a resin material, 2.3 to 12.0 wt.% of graphite, 10.0 to 45.0 wt.% of a structure auxiliary agent and 0.5 to 15.0 wt.% of a viscosity modifier and/or 0.5 to 15.0 wt.% of a plasticizer, wherein the graphite contains amorphous large particle size graphite having a particle size in a range of 1,001 to 2,000 μm by 0.1 to 10.0 wt.% with respect to the total graphite amount, and a construction having a coating film formed with the paint are provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a paint that has high durability performance and that reduces vibration impact from a moving body, and that can reduce the destruction of a structure on which the coating film is formed.

Conventionally, when moving a place where a heavy object is placed on a cart with wheels such as hard plastic or hard rubber with a very small ground contact area and applying general paint, the ground floor surface is caused by the vibration shock generated during the movement. There was a problem that the coating film peeled off in a relatively short period of time due to the progress of destruction. For this reason, there are problems such as repeated repairs many times to maintain functions such as dust prevention, or re-strike from the foundation using high-strength concrete to improve the durability of the floor surface. .
JP-A-8-143793

  The present invention provides a highly durable paint that solves the above-mentioned problems in the prior art, and a structure having a coating film formed thereon.

The present invention provides a paint containing graphite having an irregular shape and a particle size in the range of 100 to 2000 μm, and having high durability for a structure formed of the coating film.
In addition, the present invention provides a construction in which a coating film is formed using this coating material as an intermediate coating material, and using the undercoating material and top coating material to be used in accordance with the purpose of use, while maintaining high durability.

The present invention relates to the following.
(1) Resin material 30.0 to 80.0% by weight, graphite 2.3 to 12.0% by weight, structure auxiliary 10.0 to 45.0% by weight, and viscosity modifier 0.5 to 15.0% by weight % And / or a plasticizer of 0.5 to 15.0% by weight, graphite having an irregular shape and a particle size in the range of 100 to 2000 μm is 0.1 to 10.0 in the total amount of graphite. A paint characterized by containing% by weight.
(2) A structure having a coating film formed of the above-mentioned paint.

The paint of the present invention is a paint containing graphite having an irregular shape and a particle size in the range of 100 to 2000 μm in general graphite, and can give high durability to a structure formed by the coating film. Is.
In addition, by using this paint as an intermediate paint, and selecting and using the undercoat and topcoat to be used according to the purpose of use, a coating film having various characteristics can be formed while maintaining high durability. Can do. In addition, when the coating of the present invention is used as an intermediate coating, it is possible to suppress the low durability of the constituent coating film, which has been a problem in the past, peeling from the base, cracks in the top coating, etc. A coating film having extremely excellent durability can be formed on the floor surface or the like.

  The graphite used in the present invention is used by mixing general graphite with large particle size graphite having an irregular shape and a particle size of 100 to 2000 μm. The total graphite content is 2.3 to 12.0% by weight in the paint, preferably 5.0 to 12.0% by weight, and more preferably 7.0 to 10.0% by weight. The large-sized graphite having an irregular shape and a particle size of 1001 to 2000 μm is contained in an amount of 0.1 to 10.0% by weight, preferably 0.3 to 5.0% by weight in the total amount of graphite. More preferably, it is contained in an amount of 5 to 2.0% by weight. Here, when the total graphite amount is less than 3.0% by weight, the durability performance is lowered, and when it exceeds 12.0% by weight, the balance of the paint is lost, the adhesive force is lowered, the viscosity is raised, and the like. Further, if the content of the irregularly shaped large particle size graphite having a particle size of 1001 to 2000 μm is less than 0.1% by weight, the durability performance is lowered, and if it exceeds 10.0% by weight, the finished appearance after coating is adversely affected. The paint balance is lost, the adhesive strength and crack resistance are reduced, and the viscosity is reduced. The graphite other than the large particle size graphite in the total graphite preferably has a particle size of 1 μm or more and less than 1001 μm, more preferably 5 to 900 μm, and even more preferably 10 to 800 μm.

  Examples of the structure aid used in the present invention include pigments and the like, and examples include calcium carbonate, talc, barium sulfate, and the like, with calcium carbonate being preferred. The content of the structural aid is 10.0 to 45.0% by weight, preferably 20.0 to 40.0% by weight, and more preferably 25.0 to 35.0% by weight in the paint. Here, when the content of the structure auxiliary is less than 10.0% by weight, there is no structure-imparting effect, and when it exceeds 50.0% by weight, the durability, adhesive strength, and crack resistance of the paint are reduced, and the viscosity of There is a rise.

  The resin material used in the present invention is usually composed of a resin and a reactive curing agent used as necessary. Examples of the resin include synthetic resins such as alkyd resin, amino alkyd resin, acrylic resin, phenol resin, urea resin, melamine resin, epoxy resin, polyurethane resin, polyvinyl chloride resin, and polyvinyl acetate resin. Of these, epoxy resin is preferable. . Epoxy resins include bisphenol A type epoxy resins and bisphenol A type diglycidyl ether resins, among which bisphenol A type epoxy resins are preferred. Examples of the epoxy resin reactive curing agent include polyamines, modified polyamines, and modified aliphatic polyamines, among which modified aliphatic polyamines are preferred.

  The compounding amount of the resin material is 30.0 to 80.0% by weight in the paint, preferably 35.0 to 70.0% by weight, and more preferably 40.0 to 60.0% by weight. If it is less than 20.0% by weight, the workability tends to decrease due to an increase in the viscosity of the paint, and the durability also decreases. On the other hand, if it exceeds 80.0% by weight, curability and durability tend to be inferior.

  Examples of the viscosity modifier or plasticizer include phthalic acid esters such as DOP, TEP, TBP, PGE, benzyl alcohol, acetyl citrate plasticizer, epoxy plasticizer, and trimet plasticizer. The viscosity modifier and the plasticizer may be used alone or in combination. When used, the blending amounts of the viscosity modifier and the plasticizer are 0.5 to 15.0% by weight, preferably 5.0 to 12.0% by weight, and more preferably 7.0 to 7.0%, respectively, in the paint. 10.0% by weight. If it is less than 0.5% by weight, the flexibility at low temperature tends to be inferior, whereas if it exceeds 15.0% by weight, the curability and durability tend to be inferior.

  The coating material of the present invention is generally produced by filling or kneading other components as necessary with the above components. Examples of such components include pigment dispersants, antifoaming agents, leveling agents, and organic solvents.

  Examples of the pigment dispersant used in the present invention include alkylamine salts of polycarboxylic acids, alkylammonium salts, alkylroll ammonium salts, ammonium salts of acrylic copolymers, polycarboxylic acid sodium salts, and polycarboxylic acid ammonium salts. And polycarboxylic acid amino alcohol salts, polyaminoamide carboxylates, and polyaminoamide polar acid ester salts.

  Examples of the antifoaming agent used in the present invention include vinyl polymers (Dispalon P420, trade name manufactured by Enomoto Kasei Co., Ltd.), acrylic polymers (Dispalon OX-70, trade names manufactured by Enomoto Kasei Co., Ltd.). And silicon-added acrylic polymer (Disparon OX-66, trade name of Enomoto Kasei Co., Ltd.).

  When a pigment dispersant and an antifoaming agent are used, their amounts are not particularly limited, but usually 0.01 to 5.0% by weight, preferably 0.05 to 3.0% by weight, respectively, in the paint. Preferably, 0.1 to 1.0% by weight is more preferable. If it is less than 0.01% by weight, the dispersion and antifoaming properties of the paint tend to be low. On the other hand, if it exceeds 5.0% by weight, dispersibility and defoaming properties are good, but repellency and cocoon skin phenomenon tend to occur on the surface of the coating film during coating.

Examples of the leveling agent used in the present invention include acrylic polymers (Dispalon 1970, 1980-50, 1985-50, trade name manufactured by Enomoto Kasei Co., Ltd.), silicon polymers (Dispalon-1171, Enomoto Chemical ( Product name) etc.
When a leveling agent is used, the amount thereof is not particularly limited, but usually 0.1 to 5.0% by weight, preferably 0.3 to 3.0% by weight, more preferably 0.5 to 2% in the paint. More preferred is 0.0% by weight. If it is less than 0.1% by weight, the leveling effect tends to be insufficient, and if it exceeds 5.0% by weight, the repellency and adhesion of the overcoat used tend to be reduced.

  The method for producing the coating is not particularly limited, but first, it is necessary to disperse graphite and a structural aid such as a pigment. This method is usually carried out by mixing a resin material and a pigment with an organic solvent, and mixing and dispersing the mixture using various dispersing and kneading apparatuses such as a three roll, ball mill, sand mill, bead mill, kneader and the like. it can. When the viscosity modifier can dissolve the resin material, the viscosity modifier may be used instead of the organic solvent. . In addition, the resin of the resin material and the pigment are kneaded with an organic solvent or a viscosity modifier, and separately, the curing agent of the resin material is kneaded with the organic solvent (or viscosity modifier), and both are used immediately before using the paint. You may mix and knead | mix a kneaded material.

  There is no restriction | limiting in particular as an organic solvent used at this time, For example, ketone type | system | group, alcohol type | system | group, aromatic type | system | group etc. are mentioned. Specific examples include acetone, methyl ethyl ketone, cyclohexane, ethylene glycol, propylene glycol, methyl alcohol, ethyl alcohol, isopropyl alcohol, n-butyl alcohol, benzene, toluene, xylene, ethyl lactate, and ethyl acetate. These may be used alone or in combination of two or more.

  However, as will be described later, the selection of the organic solvent is appropriately determined in combination with other materials such as a pigment and a dispersant, and in some cases, when an organic solvent is used, the compatibility with the resin is increased. Obviously, the organic solvent cannot be used in the system if the coating performance falls outside the specified range. Therefore, although there is no restriction | limiting in the organic solvent to be used, You must select the organic solvent suitable for the type | system | group.

  Further, when the pigment is dispersed, the above pigment dispersant is preferably used because the dispersibility and dispersion stability of the pigment are improved.

  The pigment dispersant used for dispersing the pigment is preferably 10 parts by weight or less with respect to 100 parts by weight of the pigment. Further, graphite, other structural aids, etc. may be added at the time of dispersing the pigment, or may be added after the dispersion. Similarly, the entire amount of the organic solvent may be used when the pigment is dispersed, or a part of the organic solvent may be added after the dispersion. However, it is preferable to use at least 5 parts by weight of the organic solvent at the time of dispersion with respect to 100 parts by weight of the total amount of the resin and pigment at the time of dispersion. If the amount is less than 5 parts by weight, the viscosity at the time of dispersion is too high, and dispersion may be difficult particularly when dispersed by a ball mill, sand mill, bead mill or the like.

Next, as a method for applying the coating material thus obtained, brush coating, roller brush coating, and iron coating are performed, and among these, the iron coating is preferable.
Further, after application, the method of curing to form a coating film includes natural drying and heat drying methods, among which natural drying is desirable.

The coating material of the present invention is preferably applied to a base material that has been subjected to a base treatment with a primer or the like on a structure such as concrete or asphalt that forms a floor of a building. For example, it is preferable to coat an undercoat material such as an epoxy resin with a thickness of 10 to 100 μm, then apply the paint of the present invention, and further apply a top coat, such as an epoxy resin paint or a urethane resin paint.
By the above-described method, the paint of the present invention and a structure in which the coating film is formed and a coating film having a highly durable constituent layer is formed can be obtained.

  As the undercoat material, solvent type or water type epoxy resin type undercoat paint, urethane resin type undercoat paint, acrylic resin type undercoat paint, etc. are applied to the structure and used with improved adhesion to the structure.

  For example, an epoxy resin-based, urethane resin-based, or MMA resin-based coating that can be thickly coated with a solvent-free type is applied to the top coating to improve the finished appearance and demonstrate other functions of the top coating A structural layer and a structure having high durability can be obtained.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not restrict | limited to an Example at all. In Examples, “%” means “% by weight” and “parts” means “parts by weight” unless otherwise specified.

[Examples 1 to 11]

Below, each material in a table | surface is demonstrated.
Adeka Resin Ep4200: trade name, bisphenol A type epoxy resin manufactured by Asahi Denka Co., Ltd. BYK-W935: trade name, manufactured by Big Chemie (salt of polymer polycarboxylic acid)
Disparon P420: Trade name, defoaming agent (vinyl polymer) manufactured by Enomoto Kasei Co., Ltd.
CB-A of F: trade name, graphite manufactured by Hitachi Chemical Co., Ltd. CB-A of G: trade name, graphite ADEKA HARDNER EH451K manufactured by Hitachi Chemical Co., Ltd .: trade name, modified aliphatic manufactured by Asahi Denka Co., Ltd. Polyamine

Components A to H shown in Table 1-1 were mixed with a dissolver to obtain a main agent.
I and J shown in Table 1-2 were mixed separately by a dissolver and used as a curing agent.

    After mixing the formulations shown in Table 1-1 and Table 1-2, the base agent / curing agent was mixed in a ratio of 4 to 1, and an epoxy solvent type concrete primer (made by Hitachi Chemical Co., Ltd., Each of them was painted with a trowel on the product name Histar EP primer.

[Comparative Example 1-11]

Components A to H shown in Table 2-1 were mixed with a dissolver to obtain a main agent.
I and J shown in Table 2-2 were mixed separately with a dissolver to prepare a curing agent.

After mixing the formulations shown in Table 2-1 and Table 2-2, the main agent and the curing agent were mixed in a ratio of 4 to 1, and each was coated on the epoxy solvent type concrete primer with a trowel.
However, for [Comparative Examples 2 to 4], the blending amount was determined from the epoxy equivalent of the epoxy resin and the amount of active hydrogen possessed by the modified aliphatic polyamine, and a curing agent in an amount suitable for each blending was mixed (Comparative Example 2 was A: I = 82: 34.8, Comparative Example 3 was mixed in an amount of A: I = 18: 7.7, and Comparative Example 4 was mixed in an amount of A: I = 66: 28).

[Comparative Example 12]

  Each of the blends shown in Table 3 was mixed, and then coated with a trowel on the epoxy solvent type concrete primer.

[Comparative Example 13]

  Each of the formulations shown in Table 4 was mixed, and then coated on the epoxy solvent type concrete primer with a trowel.

[Comparative Example 14]
In addition, epoxy solvent-free reactive paint [Comparative Example 1] was directly applied to a concrete block on an epoxy solvent-type concrete primer (made by Hitachi Chemical Co., Ltd., trade name Histar EP primer). Were compared.

[Preparation of test plate]
(1) An epoxy solvent type concrete primer is applied to a 30 cm square concrete block and dried, and then the paint prepared in [Examples 1 to 11] is applied, and the dry film thickness is in the range of 0.5 to 15.0 mm. After coating and drying, a top coating (epoxy solvent-free reactive coating, manufactured by Hitachi Chemical Co., Ltd., trade name Histar EF8410) was used as a test specimen. The top coating was applied without coating ([Examples 12 and 13]) and with a dry coating film thickness of 0.2 mm to 5.0 mm ([Examples 1 to 11] [Comparison In the case of Examples 1 to 14]), a test plate (1) was produced. .
[Comparative Examples 1 to 13] were produced in the same manner.
(2) The test piece prepared according to JIS-K5600 was coated in the same manner as (1) to prepare a test plate (2).
[Coating test]
(1) Durability test After the test plate (1) produced by the above method was dried at room temperature for 7 days, a 1 kg iron ball was dropped from a height of 100 cm according to JIS-K5600-5-3, and the coating film The state of floating, peeling, cracking, etc. was observed and the number of times of resistance was evaluated.
The evaluation results were based on [Comparative Example 12], and the resistance count was 3 times or more.
Judgment criteria are: ○: 3 times or more, Δ: less than 3 times, 2 times or more, ×: less than 2 times (2) Other tests JIS- after the test plate (2) prepared by the above method is dried at room temperature for 7 days According to K5600, other various coating film tests were performed, and the results were evaluated. Test items and criteria are as follows.
Paint viscosity: The preferred viscosity range of the paint immediately after mixing the main agent and curing agent is 10 to 20 Pa · s, and within that range = ○ Others = ×
Paint workability: In ironing work, from the three points of ironing, smoothness, and curability, it is equivalent to or better than general epoxy topcoat paint.
It is inferior to it = ×
Paint appearance: After painting, the paint film appearance is smooth = ○ Unevenness, level difference = ×
Adhesion to the substrate: Adhesive strength with the substrate mortar was destroyed by the substrate material using a Kenken-type testing machine, and 1.96 MPa (20 kgf / cm ² ) or more = ○, less than that = ×
(Test method was in accordance with NNK-005 shown in the Painted Floor Industry Association)
Top coat workability: When coating with the above coating film thickness, it is possible to conceal the intermediate coating material, and there is no problem with troweling during painting = ○, otherwise = ×
Top coat adhesion: According to JIS-K5600-5-6, in the case of 90% or more in 2 mm × 2 mm × 100 cross-cut test = ○, less = ×
Crack resistance: According to JIS-K5600-5-1, coated on an iron plate with a thickness of 0.8 mm, subjected to a bending test after curing and drying, φ = 10 mm, when no abnormality such as cracking occurs at 90 ° folding = ○ , Otherwise = ×

[Examples 12 and 13]
[Example 3] was evaluated as [Example 12] when no top coating was applied, and [Example 13] when [No.

尚、総合判定は、評価項目において全て満足したものを○とし、ひとつでも満足できないものがある場合は、×とした。 These test results are summarized in the following table.

In addition, the comprehensive judgment was evaluated as “◯” when all of the evaluation items were satisfied, and “×” when there was one that was not satisfactory.

From the coating film performance test results shown in Table 5, [Example] and [Comparative Example] were applied as intermediate coating materials, combined as a part of the constituent layers of general undercoating materials and top coating materials, and evaluated.
[Examples 1 to 11] include 53.6% by weight of resin material (resin and curing agent) in the paint (the amount of resin in the main agent: 47% by weight, the amount of curing agent in the curing agent: 80% by weight). The total graphite amount is 2.4 to 12% by weight (total graphite amount in the main agent: 3 to 15% by weight), and graphite having an irregular shape and a particle size in the range of 100 to 2000 μm is used as the total graphite amount. The content is 0.1 to 10.0% by weight, and the viscosity modifier is 10.4% by weight (the amount of the viscosity modifier in the main agent: 8% by weight, the amount of the viscosity modifier in the curing agent: 20% by weight) ), 21.6 to 31.2% by weight of extender pigment as a structural aid (the amount of structural aid in the main agent: 27 to 39% by weight) was evaluated, both of which are durable and paint work We were able to obtain satisfactory performance in all evaluation items such as performance and paint appearance.
Further, as shown in [Examples 12 and 13], durability was tested only with the product of the present invention without applying a top coat, and as a result, high durability was obtained.

  [Comparative Example 1] is a comparison with [Examples 3 to 9], in which no graphite is used in the paint, and only the extender pigment is contained in the paint at a content of 33.6% by weight (content in the main agent). 42 wt%), and the coating film performance test was conducted, and the target performance was not obtained with respect to durability, base adhesion, and crack resistance.

In [Comparative Example 2], the amount of graphite used was within the range of the present invention, and the evaluation was made when the amount of resin material and the amount of extender pigment used were outside the range of the present invention.
[Example] Resin material amount in paint: 53.6% by weight (resin material amount in main agent: 47% by weight), extender pigment content in paint: 21.6-31.2% by weight (in main agent) Extender pigment amount: 27-39% by weight)
[Comparative Example 2] amount of resin material in paint: 81.4% by weight (resin material amount in base agent: 82% by weight), amount of extender pigment in paint: 0% by weight (amount of extender pigment in base agent: 0) weight%)

[Comparative Example 3] was evaluated when the total amount of graphite, the amount of resin material, and the amount of extender pigment were outside the scope of the present invention.
[Comparative Example 3] Total graphite amount in paint: 13.7 wt% (total graphite amount in main agent: 13.5 wt%), resin material amount: 23.4 wt% (resin material amount in main agent: 18 wt%), extender pigment content in paint: 47.9 wt% (extreme pigment content in main agent: 52.5 wt%)

In Comparative Example 4, only the amount of extender pigment was out of the scope of the present invention, and a comparative evaluation was made.
The amount of extender pigment in the paint of [Comparative Example 4]: 5.9% by weight (the amount of extender pigment in the main agent: 8% by weight)

  As a result, in [Comparative Examples 2 to 4], none of the target performance was obtained in terms of durability, paint viscosity, base adhesion, and the like.

[Comparative Examples 5 to 11] is a comparative evaluation of the total graphite amount and / or the irregular shape, and the content of large particle size graphite having a particle size in the range of 100 to 2000 μm is out of the range of the present invention. As a result, there were those in which the durability was not improved, the coating viscosity was out of a predetermined range, and the workability of the top coating was lowered. Further, in all cases, the crack resistance was not improved.
Total graphite amount in the paint of [Comparative Example 5]: 2.2% by weight (total graphite amount in the main agent: 2.75% by weight)
[Comparative Example 6] Total graphite amount in paint: 2.4% by weight (total graphite amount in main agent: 3% by weight), large particle size graphite amount: 0% by weight
[Comparative Example 7] Total graphite amount in paint: 8% by weight (total graphite amount in main agent: 10% by weight), large particle size graphite amount: 0% by weight
[Comparative Example 8] Total graphite amount in paint: 9.6% by weight (total graphite amount in main agent: 12% by weight), large particle size graphite amount in total graphite amount: 20% by weight
[Comparative Example 9] Total amount of graphite in paint: 12% by weight (total amount of graphite in main agent: 15% by weight), large particle size graphite: 0% by weight
[Comparative Example 10] Total graphite content in the paint: 12.12 wt% (total graphite content in the main agent: 15.15 wt%), large particle size graphite content in the total graphite content: 1 wt%
[Comparative Example 11] Total amount of graphite in paint: 12.4% by weight (total amount of graphite in main component: 15.5% by weight), amount of large particle size graphite in total amount of graphite: 9.7% by weight

  [Comparative Examples 13 and 14] are typical examples of commonly used mortars, but none of them exhibited durability.

Claims (2)

  Resin material 30.0-80.0 wt%, graphite 2.3-12.0 wt%, structure aid 10.0-45.0 wt% and viscosity modifier 0.5-15.0 wt% and / or Alternatively, it contains 0.5 to 15.0% by weight of a plasticizer, and graphite has an irregular shape and a particle size of 0.1 to 10.0% by weight based on the total amount of graphite in the range of 100 to 2000 μm. A paint characterized by.   A construction having a coating film formed of the paint according to claim 1.